Eurybia divaricata

White Wood Aster , aster à rameaux étalés

Eurybia divaricata (L.) G.L. Nesom is native to dry to mesic, eastern deciduous and mixed deciduous woods, edges and clearings, and woodland roadsides (Brouillet 2006 FNA) in the Appalachian Mountains and Piedmont from Ontario and Québec south to Georgia and Alabama. It is introduced in Europe (Netherlands).  The species is the smaller headed member of the Biotia group of Eurybia and has eglandular peduncles < 15 mm long and eglandular phyllaries. The species is diploid (2n=18). 

The species is often confused with E. chlorolepis (longer peduncles), E. schreberi (bigger heads), E. macrophylla (bigger heads, phyllaries glandular, rays usually violet-purple) and sometimes with Symphyotrichum cordifolium (panicled array of heads, usually violet rays).